CN213332441U

CN213332441U - Pneumatic vacuum valve

Info

Publication number: CN213332441U
Application number: CN202022000673.0U
Authority: CN
Inventors: 时百超; 孙保定
Original assignee: Henan Lvbo Energy Equipment Co ltd
Current assignee: Henan Lvbo Energy Equipment Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-06-01
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses a pneumatic vacuum valve, including valve body, case and pneumatic piece, pneumatic piece is installed on valve body upper portion, is equipped with the valve pocket in the valve body, is equipped with vacuum valve port and evacuation valve port on the valve body, and vacuum valve port and evacuation valve port all communicate with each other with the valve pocket, and the case passes through sealing connecting piece and installs the valve intracavity and the upper portion of case is connected with pneumatic piece, and the lower part of case is equipped with the sealing plug, and the sealing plug corresponds the cooperation with the vacuum valve port. The utility model has simple structure, easy manufacture and low cost, the valve core is driven by the cylinder, and the matched ball bush keeps the valve core in linear motion; the sealing plug is provided with an upper rubber sealing washer and a lower rubber sealing washer to clamp the end part of the valve core, so that the wear resistance is improved, and the service life is prolonged; the sealing structure is multi-way, the sealing performance is good, the vacuum degree of the system can be kept, and the smooth production is ensured; finally, the cylinder is used as a driving force, so that the cylinder can be conveniently combined with automatic control, and the opening and closing sensitivity of the negative pressure conveying pipeline is improved.

Description

Pneumatic vacuum valve

Technical Field

The utility model belongs to the technical field of valve equipment technique and specifically relates to a pneumatic vacuum valve is related to for negative pressure pipeline.

Background

When the fire extinguisher is filled with dry powder, the fire extinguisher is filled in vacuum, and a vacuum valve is usually arranged on a connecting pipeline between a vacuum pump and a vacuum box and used for ensuring that a negative pressure conveying pipeline can be automatically opened or closed under the control of a PLC. However, the service life of the currently marketed vacuum valve is short due to design reasons, and the sealing element in the valve is easy to wear, so that the vacuum valve leaks air, the vacuum degree of the system is not up to standard, and normal production is affected.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art existence, the utility model provides a pneumatic vacuum valve, the leakproofness is good, long service life.

The utility model discloses the technical scheme who adopts does:

a pneumatic vacuum valve comprises a valve body, a valve core and a pneumatic piece, wherein the pneumatic piece is arranged on the upper portion of the valve body, a valve cavity is arranged in the valve body, a vacuum valve port and at least one vacuumizing valve port are arranged on the valve body, the vacuum valve port and each vacuumizing valve port are communicated with the valve cavity, the valve core is arranged in the valve cavity through a sealing connecting piece, the upper portion of the valve core is connected with the pneumatic piece, a sealing plug is arranged on the lower portion of the valve core, and sealing gaskets are arranged on the upper end face and the lower end face of the sealing plug in order to ensure the sealing of the joint; the sealing plug is correspondingly matched with the vacuum valve port. The pneumatic element drives the valve core, the valve core drives the sealing plug to move up and down in the valve cavity to realize the plugging and the releasing of the vacuum valve port, the vacuum valve port is connected with a vacuum pump, and the vacuumizing valve port is communicated with equipment needing vacuumizing, such as a vacuum box and the like.

As a preferred scheme of the utility model, the sealing connecting piece comprises an upper end cover, the upper end cover is installed at the upper opening of the valve body, and a sealing piece I is arranged at the contact position of the upper end cover and the inner wall of the valve body, and the sealing piece I is a sealing ring; the upper end cover is provided with a valve core through hole for the valve core to pass through, and the valve core downwards passes through the valve core through hole and enters the valve cavity; and a sealing element II is arranged at the contact position of the valve core and the inner wall of the through hole of the valve core.

As a preferred scheme of the utility model, case upper portion cover is equipped with the ball bush, and the ball bush is installed downthehole at the bush of upper end cover, and the axis that bush hole and case through-hole communicate with each other and bush hole coincides with the axis of case through-hole, and the ball bush is guaranteeing with the valve core junction under the air-tight prerequisite, can also ensure the valve core straight line from top to bottom.

As a preferable scheme of the present invention, the sealing member II includes a first sealing member II and a second sealing member II; second sealing member II is located first sealing member II top, and first sealing member II is the sealing washer, is equipped with seal installation groove at the case outer wall, and in the sealing washer was installed to seal installation groove, for sealed effect is better, can set up a plurality of seal installation groove installation sealing washers.

The second sealing element II is positioned at the bottom of the inner wall of the through hole of the valve core and comprises a lip-shaped sealing abdicating groove and a retaining ring mounting groove, and the lip-shaped sealing ring is positioned in the lip-shaped sealing abdicating groove and sleeved on the valve core; and the lip-shaped sealing ring is supported by an elastic check ring, and the elastic check ring is arranged in the check ring mounting groove.

As an optimal scheme of the utility model, pneumatic component includes the cylinder, and the piston rod of cylinder passes through floating joint and is connected with the case top. The cylinder passes through the bracing piece to be connected with the upper end cover, is equipped with on the upper end cover to support the mounting hole, and the one end of bracing piece is installed in supporting the mounting hole, and the other end of bracing piece is connected with the cylinder body of cylinder, and the bracing piece is raised the cylinder and is provided the stroke space for the flexible of piston rod and case.

As a preferred scheme of the utility model, the vacuum valve port is flange's centre bore, and flange passes through round nut and valve body connection, and flange's one end stretches into the valve intracavity, and the centre bore tip that is located the valve intracavity is the bell mouth, and the bell mouth is the vacuum valve port, and the outer terminal surface and the bell mouth cooperation position of sealing plug are the bell face, and the realization that the toper cooperation structure can be better is sealed.

The utility model has simple structure, easy manufacture and low cost, the valve core is driven by the cylinder and is provided with the ball bush in a matching way, so that the valve core keeps linear motion, and abnormal abrasion of the sealing structure caused by deviating the motion track is effectively reduced; secondly, the sealing plug at the end part of the valve core is clamped by the upper and lower rubber sealing gaskets, so that the wear resistance is improved, and the service life is prolonged; thirdly, a plurality of sealing structures are arranged on the contact surfaces of the valve cavity, the upper end cover and the valve core, so that the sealing performance is improved, the vacuum degree of the system is kept, and the smooth production is ensured; finally, the cylinder is used as a driving force, so that the cylinder can be conveniently combined with automatic control, and the opening and closing sensitivity of the negative pressure conveying pipeline is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

Example (b):

a pneumatic vacuum valve, as shown in figures 1 and 2, comprises a valve body 1, a valve core 2 and a pneumatic piece 3, wherein the pneumatic piece 3 comprises a cylinder 31. The cylinder passes through the bracing piece to be connected with the upper end cover on valve body 1 upper portion, is equipped with on the upper end cover to support the mounting hole, and the one end of bracing piece is installed in supporting the mounting hole, and the other end of bracing piece is connected with the cylinder body of cylinder, and the bracing piece is raised the cylinder and is provided the stroke space for the flexible of piston rod and case.

The valve body 1 is internally provided with a valve cavity 4, the valve body 1 is provided with a vacuum valve port 51 and a vacuum pumping valve port 52, and the vacuum valve port 51 and the vacuum pumping valve port 52 are both communicated with the valve cavity 4. In this embodiment, the vacuum valve port 51 serves as a central hole of the connecting flange 14, the connecting flange 14 is connected with the valve body 1 through a round nut, one end of the connecting flange 14 extends into the valve cavity 4, the end of the central hole in the valve cavity is a conical port, and the conical port is a vacuum valve port.

The valve core 2 is arranged in the valve cavity 4 through a sealing connecting piece, the upper part of the valve core 2 is connected with a piston rod of the air cylinder 31 through a floating joint 13, the lower part of the valve core 2 is provided with a sealing plug 6, the sealing plug 6 is a rubber sealing ring, in order to ensure the sealing of the joint of the valve core and the sealing plug, the upper end surface and the lower end surface of the sealing plug 6 are both provided with sealing gaskets 15, and the sealing gaskets 15 are rubber sealing gaskets; the outer end face of the sealing plug 6 is matched with the conical opening to form a conical surface, and the conical matching structure can better realize sealing.

Specifically, the sealing connecting piece comprises an upper end cover 7, the upper end cover 7 is installed at an upper opening of the valve body 1, a sealing element I8 is arranged at a contact position of the upper end cover 7 and the inner wall of the valve body 1, and the sealing element I8 is a sealing ring; the upper end cover 7 is provided with a valve core through hole for the valve core 2 to pass through, the valve core 2 downwards passes through the valve core through hole to enter the valve cavity 4, the upper part of the valve core 2 is sleeved with a ball bush 11, the ball bush 11 is arranged in a bush hole of the upper end cover 7, the bush hole is communicated with the valve core through hole, the axis of the bush hole is superposed with the axis of the valve core through hole, the ball bush can ensure that the valve core is linearly arranged up and down on the premise of ensuring that the joint of the ball bush and the valve core is airtight, and a sealing part II is arranged at the.

The sealing piece II comprises a first sealing piece II101 and a second sealing piece II; the second sealing element II is positioned above the first sealing element II101, the first sealing element II101 is a rubber sealing ring, a sealing installation groove is formed in the outer wall of the valve core 2, the sealing ring is installed in the sealing installation groove, and the sealing ring can be installed in a plurality of sealing installation grooves for better sealing effect.

The second sealing element II is positioned at the bottom of the inner wall of the through hole of the valve core and comprises a lip-shaped sealing ring 1021 and an elastic retainer ring 1022, the bottom of the inner wall of the through hole of the valve core is provided with a lip-shaped sealing abdicating groove and a retainer ring installation groove, and the lip-shaped sealing ring 1021 is positioned in the lip-shaped sealing abdicating groove and sleeved on the valve core 2; and the lip-shaped seal ring is supported by a circlip 1022, the circlip 1022 being installed in the circlip installation groove.

The vacuum valve port 51 is communicated with a vacuum pump, the vacuumizing valve port 52 is communicated with a vacuum box, and when a negative pressure pipeline of a production system needs to be closed, the rubber sealing plug 6 of the valve core 2 is in sealing fit with the vacuum valve port 51 only by the action of the cylinder 3; when the production system needs to be vacuumized, the rubber sealing plug 6 of the valve core 2 is separated from the vacuum valve port 51 through the cylinder 3, and a vacuum pump and a vacuum box are communicated to vacuumize the system.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A pneumatic vacuum valve, characterized by: the valve comprises a valve body (1), a valve core (2) and a pneumatic piece (3), wherein the pneumatic piece (3) is installed on the upper portion of the valve body (1), a valve cavity (4) is formed in the valve body (1), a vacuum valve port (51) and at least one vacuumizing valve port (52) are formed in the valve body (1), the vacuum valve port (51) and each vacuumizing valve port (52) are communicated with the valve cavity (4), the valve core (2) is installed in the valve cavity (4) through a sealing connecting piece, the upper portion of the valve core (2) is connected with the pneumatic piece (3), a sealing plug (6) is arranged on the lower portion of the valve core (2), and the sealing plug (6) is correspondingly matched with the vacuum valve port (.

2. The pneumatic vacuum valve according to claim 1, wherein: the sealing connecting piece comprises an upper end cover (7), the upper end cover (7) is arranged at an opening at the upper part of the valve body (1), and a sealing piece I (8) is arranged at the contact part of the upper end cover (7) and the inner wall of the valve body (1); the upper end cover (7) is provided with a valve core through hole for the valve core (2) to pass through, and the valve core (2) passes through the valve core through hole downwards and enters the valve cavity (4); and a sealing element II is arranged at the contact position of the valve core (2) and the inner wall of the through hole of the valve core.

3. The pneumatic vacuum valve according to claim 2, wherein: the ball bushing (11) is sleeved on the upper portion of the valve core (2), the ball bushing (11) is installed in a bushing hole of the upper end cover (7), the bushing hole is communicated with the valve core through hole, and the axis of the bushing hole coincides with the axis of the valve core through hole.

4. The pneumatic vacuum valve according to claim 2, wherein: the sealing piece II comprises a first sealing piece II (101) and a second sealing piece II, and the second sealing piece II is positioned at the bottom of the inner wall of the through hole of the valve core; the second seal II is located above the first seal II (101).

5. The pneumatic vacuum valve according to claim 4, wherein: the first sealing element II (101) is a sealing ring, a sealing installation groove is formed in the outer wall of the valve core (2), and the sealing ring is installed in the sealing installation groove.

6. The pneumatic vacuum valve according to claim 4 or 5, wherein: the second sealing element II comprises a lip-shaped sealing ring (1021) and an elastic retainer ring (1022), a lip-shaped sealing abdicating groove and a retainer ring installation groove are formed in the bottom of the inner wall of the through hole of the valve core, and the lip-shaped sealing ring (1021) is positioned in the lip-shaped sealing abdicating groove and sleeved on the valve core (2); and the lip-shaped sealing ring (1021) is supported by an elastic check ring (1022), and the elastic check ring (1022) is installed in the check ring installation groove.

7. A pneumatic vacuum valve according to claim 1 or 2, wherein: the pneumatic piece (3) comprises an air cylinder (31), and a piston rod of the air cylinder (31) is connected with the top of the valve core (2) through a floating joint (13).

8. The pneumatic vacuum valve according to claim 1, wherein: the vacuum valve port (51) is a central hole of the connecting flange (14).

9. The pneumatic vacuum valve according to claim 8, wherein: the connecting flange (14) is connected with the valve body (1), one end of the connecting flange (14) extends into the valve cavity (4), the end part of the central hole in the valve cavity is a conical opening, the conical opening is a vacuum valve opening, and the matching part of the outer end surface of the sealing plug (6) and the conical opening is a conical surface.

10. The pneumatic vacuum valve according to claim 9, wherein: and sealing gaskets (15) are arranged on the upper end surface and the lower end surface of the sealing plug (6).